DS Laboratories Spectral Beard 30mlSpectral. BRD is a breakthrough serum that offers an integrated approach to improve coverage and reduce patchiness of your facial hair. For a thicker and fuller beard, weve combined the most effective, clinically proven ingredients to create a serum that promotes growth, increases density, and improves facial hair. Nanosomes are able to deliver a continuous release of Spectral. BRDs active ingredients to target locations which offers higher efficacy